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Message-ID: <4C568D6F.3050004@kernel.org>
Date: Mon, 02 Aug 2010 02:18:39 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: "H. Peter Anvin" <hpa@...or.com>
CC: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
Cyrill Gorcunov <gorcunov@...nvz.org>,
Pekka Enberg <penberg@...helsinki.fi>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH -v3 2/2] x86: more early console output from compressed/misc.c
will get
|Decompressing Linux... Parsing ELF... done.
|Booting the kernel.
in serial console.
reuse code from arch/x86/boot/
and we can use printf if needed
-v2: define BOOT_BOOT_H to avoid include boot.h
-v3: early_serial_base need to be static in misc.c ?
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
arch/x86/boot/compressed/misc.c | 65 +++++++++++++++++++++++++++++++++++++++-
arch/x86/boot/main.c | 6 +--
2 files changed, 66 insertions(+), 5 deletions(-)
Index: linux-2.6/arch/x86/boot/compressed/misc.c
===================================================================
--- linux-2.6.orig/arch/x86/boot/compressed/misc.c
+++ linux-2.6/arch/x86/boot/compressed/misc.c
@@ -125,12 +125,14 @@ static void error(char *m);
*/
static struct boot_params *real_mode; /* Pointer to real-mode data */
static int quiet;
+static int debug;
void *memset(void *s, int c, size_t n);
void *memcpy(void *dest, const void *src, size_t n);
static void __putstr(int, const char *);
#define putstr(__x) __putstr(0, __x)
+#define puts(__x) __putstr(0, __x)
#ifdef CONFIG_X86_64
#define memptr long
@@ -145,6 +147,11 @@ static char *vidmem;
static int vidport;
static int lines, cols;
+#define BOOT_BOOT_H
+#include "../isdigit.h"
+#include "../string.c"
+#include "../printf.c"
+
#ifdef CONFIG_KERNEL_GZIP
#include "../../../../lib/decompress_inflate.c"
#endif
@@ -161,6 +168,28 @@ static int lines, cols;
#include "../../../../lib/decompress_unlzo.c"
#endif
+static unsigned long fs;
+static inline void set_fs(unsigned long seg)
+{
+ fs = seg << 4; /* shift it back */
+}
+typedef unsigned long addr_t;
+static inline char rdfs8(addr_t addr)
+{
+ return *((char *)(fs + addr));
+}
+#include "../cmdline.c"
+static inline int cmdline_find_option(const char *option, char *buffer, int bufsize)
+{
+ return __cmdline_find_option(real_mode->hdr.cmd_line_ptr, option, buffer, bufsize);
+}
+static inline int cmdline_find_option_bool(const char *option)
+{
+ return __cmdline_find_option_bool(real_mode->hdr.cmd_line_ptr, option);
+}
+static int early_serial_base;
+#include "../early_serial_console.c"
+
static void scroll(void)
{
int i;
@@ -170,6 +199,16 @@ static void scroll(void)
vidmem[i] = ' ';
}
+static void serial_putchar(int ch)
+{
+ unsigned timeout = 0xffff;
+
+ while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
+ cpu_relax();
+
+ outb(ch, early_serial_base + TXR);
+}
+
static void __putstr(int error, const char *s)
{
int x, y, pos;
@@ -179,6 +218,14 @@ static void __putstr(int error, const ch
if (!error)
return;
#endif
+ if (early_serial_base) {
+ const char *str = s;
+ while (*str) {
+ if (*str == '\n')
+ serial_putchar('\r');
+ serial_putchar(*str++);
+ }
+ }
if (real_mode->screen_info.orig_video_mode == 0 &&
lines == 0 && cols == 0)
@@ -305,8 +352,10 @@ asmlinkage void decompress_kernel(void *
{
real_mode = rmode;
- if (real_mode->hdr.loadflags & QUIET_FLAG)
+ if (cmdline_find_option_bool("quiet"))
quiet = 1;
+ if (cmdline_find_option_bool("debug"))
+ debug = 1;
if (real_mode->screen_info.orig_video_mode == 7) {
vidmem = (char *) 0xb0000;
@@ -319,9 +368,23 @@ asmlinkage void decompress_kernel(void *
lines = real_mode->screen_info.orig_video_lines;
cols = real_mode->screen_info.orig_video_cols;
+ console_init();
+ if (debug)
+ putstr("early console in decompress_kernel\n");
+
free_mem_ptr = heap; /* Heap */
free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
+ if (debug) {
+ putstr("decompress_kernel:\n");
+ printf(" input: [0x%lx-0x%lx], output: 0x%lx, heap: [0x%lx-0x%lx]\n",
+ (unsigned long)input_data,
+ (unsigned long)input_data + input_len - 1,
+ (unsigned long)output,
+ (unsigned long)heap,
+ (unsigned long)heap + BOOT_HEAP_SIZE - 1);
+ }
+
if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1))
error("Destination address inappropriately aligned");
#ifdef CONFIG_X86_64
Index: linux-2.6/arch/x86/boot/main.c
===================================================================
--- linux-2.6.orig/arch/x86/boot/main.c
+++ linux-2.6/arch/x86/boot/main.c
@@ -132,6 +132,8 @@ void main(void)
/* Initialize the early-boot console */
console_init();
+ if (cmdline_find_option_bool("debug"))
+ puts("early console in setup code\n");
/* End of heap check */
init_heap();
@@ -171,10 +173,6 @@ void main(void)
/* Set the video mode */
set_video();
- /* Parse command line for 'quiet' and pass it to decompressor. */
- if (cmdline_find_option_bool("quiet"))
- boot_params.hdr.loadflags |= QUIET_FLAG;
-
/* Do the last things and invoke protected mode */
go_to_protected_mode();
}
--
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